A planet moves around the sun. At a given point P, it is closed from the sun at a distance d1 and has a speed v1 . At another point Q. when it is farthest from the sun at a distance d2, its speed will be :
Answer & explanation
Correct answer: option 3
According to law of conservation of angular momentum :
\(m v_1 d_1 = m v_2 d_2\)
\(v_2 = \frac{d_1 v_1}{d_2}\)